improve logging, clean code, fix vulnerabilities

[Catharsis68]

1. Adding a mode to the connect event - either it's single or high availability mode based on JAMBONES_REDIS_SENTINELS
2. Put creating the sentinels array in a separate function in utils buildSentinels()
3. Fix vulnerabilities in package.json via npm audit fix
   3 vulnerabilities (1 moderate, 1 high, 1 critical) => found 0 vulnerabilities

1..100
tests 100
pass 100

ok

[xquanluu]

where this mode variable is being used?

[Catharsis68]

line 62 - Successfully connected to Redis ${mode} mode

[xquanluu]

Why do we have package-lock.json changes and there is no package.json change?

[Catharsis68]

Why do we have package-lock.json changes and there is no package.json change?

Fixes within semver range: If npm audit fix can resolve vulnerabilities by updating packages within the version ranges specified in your package.json, it will only update package-lock.json to reflect the new, secure versions. Your package.json won't need changes because the updated versions still satisfy the version constraints